ARM_key1按键按下，打印key1

include/key.h

#ifndef __KEY_H__
#define __KEY_H__

#include "stm32mp1xx_exti.h"
#include "stm32mp1xx_gic.h"
#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"



//对RCC/GPIO/EXTI进行初始化
void hal_key1_exit_init();



//对GIC章节进行初始化
void hal_key1_gic_init();


#endif
*/

#ifndef __KEY_H__
#define __KEY_H__

#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_exti.h"
#include "stm32mp1xx_gic.h"




//对RCC/GPIO/EXTI章节的初始化
void hal_key1_exit_init();

//对GIC的初始化
void hal_key1_gic_init();





#endif

src/key.c

/*
#include "key.h"


//对RCC/GPIO/EXTI进行初始化
void hal_key1_exit_init()
{
	//RCC_MP_AHB4ENSETR寄存器使能gpio组控制器
	//[5] = 1
	RCC->MP_AHB4ENSETR |= (0x1 << 5);


	//GPIOx_MODER寄存器设置引脚为输入模式
	//pf9[19:18]=00
	//pf7[15:14]=00
	//pf8[17:16]=00
	GPIOF->MODER &= (~(0x3 << 18));


	//EXTI_EXTICR3寄存器,外部中断选择寄存器
	//选择和哪一个EXTI进行连接
	//EXTI9[15:8]=0x05
	//EXTI7[31:24]=0x05
	//EXTI8[7:0]=0x05
	EXTI->EXTICR3 &= (~(0xFF) << 8);
	EXTI->EXTICR3 |= (0x05 << 8);

	//EXTI_FTSR1寄存器，设置中断下降沿触发方式
	EXTI->FTSR1 |= (0x1 << 9);
	
	//EXTI_IMR1中断屏蔽选择寄存器
	EXTI->C1IMR1 |= (0b01 << 9);
}



//对GIC的初始化
void hal_key1_gic_init()
{
	//GICD的初始化
	//1.使能GICD层控制器
	GICD->CTRL |= 0x1;
	//2.设置GICD层的中断使能
	GICD->ISENABLER[3] |= (0x1 << 3);
	//3.设置GICD层中断优先级[31:27]
	GICD->IPRIORITYR[24] &= (~(0x1F << 27));
	//4.设置GICD层中断目标分配寄存器[24:25]
	GICD->ITARGETSR[24] |= (0x1 << 24);

	//GICC章节初始化
	//1.使能GICC层控制器
	GICC->CTRL |= 0x1;
	//2.设置GICC层中断优先级
	GICC->PMR |= (0x1F << 3);
}
*/
#include "key.h"

//对RCC/GPIO/EXTI章节的初始化
void hal_key1_exit_init()
{
	//RCC
	RCC->MP_AHB4ENSETR |= (0x1 << 5);
	//GPIO设置输入模式
	GPIOF->MODER &= (~(0x3 << 18));
	//EXTI
	//1.外部中断选择寄存器,选择与哪个EXTI(16)链接
	EXTI->EXTICR3 &= (~(0xff << 8));
	EXTI->EXTICR3 |= (0x5 << 8);
	//2.设置中断下降沿触发方式
	EXTI->FTSR1 |= (0x1 << 9);
	//3.中断屏蔽选择寄存器
	EXTI->C1IMR1 |= (0b01 << 9);



}

//对GIC的初始化
void hal_key1_gic_init()
{
	//GICD的初始化
	//1.使能GICD层控制器
	GICD->CTRL |= 0x1;
	//2.设置GICD层的中断使能
	GICD->ISENABLER[3] |= (0x1 << 3);
	//3.设置GICD层中断优先级
	GICD->IPRIORITYR[24] &= (~(0x1F << 27));
	//4.设置GICD层中断目标分配寄存器
	GICD->ITARGETSR[24] |= (0x1 << 24);

	//GICC章节初始化
	//1.使能GICC层控制器
	GICC->CTRL |= 0x1;
	//2.设置GICC层中断优先级
	GICC->PMR |= (0x1 << 3);
}

main.c

/*
#include "key.h"


//对RCC/GPIO/EXTI进行初始化
void hal_key1_exit_init()
{
	//RCC_MP_AHB4ENSETR寄存器使能gpio组控制器
	//[5] = 1
	RCC->MP_AHB4ENSETR |= (0x1 << 5);


	//GPIOx_MODER寄存器设置引脚为输入模式
	//pf9[19:18]=00
	//pf7[15:14]=00
	//pf8[17:16]=00
	GPIOF->MODER &= (~(0x3 << 18));


	//EXTI_EXTICR3寄存器,外部中断选择寄存器
	//选择和哪一个EXTI进行连接
	//EXTI9[15:8]=0x05
	//EXTI7[31:24]=0x05
	//EXTI8[7:0]=0x05
	EXTI->EXTICR3 &= (~(0xFF) << 8);
	EXTI->EXTICR3 |= (0x05 << 8);

	//EXTI_FTSR1寄存器，设置中断下降沿触发方式
	EXTI->FTSR1 |= (0x1 << 9);
	
	//EXTI_IMR1中断屏蔽选择寄存器
	EXTI->C1IMR1 |= (0b01 << 9);
}



//对GIC的初始化
void hal_key1_gic_init()
{
	//GICD的初始化
	//1.使能GICD层控制器
	GICD->CTRL |= 0x1;
	//2.设置GICD层的中断使能
	GICD->ISENABLER[3] |= (0x1 << 3);
	//3.设置GICD层中断优先级[31:27]
	GICD->IPRIORITYR[24] &= (~(0x1F << 27));
	//4.设置GICD层中断目标分配寄存器[24:25]
	GICD->ITARGETSR[24] |= (0x1 << 24);

	//GICC章节初始化
	//1.使能GICC层控制器
	GICC->CTRL |= 0x1;
	//2.设置GICC层中断优先级
	GICC->PMR |= (0x1F << 3);
}
*/
#include "key.h"

//对RCC/GPIO/EXTI章节的初始化
void hal_key1_exit_init()
{
	//RCC
	RCC->MP_AHB4ENSETR |= (0x1 << 5);
	//GPIO设置输入模式
	GPIOF->MODER &= (~(0x3 << 18));
	//EXTI
	//1.外部中断选择寄存器,选择与哪个EXTI(16)链接
	EXTI->EXTICR3 &= (~(0xff << 8));
	EXTI->EXTICR3 |= (0x5 << 8);
	//2.设置中断下降沿触发方式
	EXTI->FTSR1 |= (0x1 << 9);
	//3.中断屏蔽选择寄存器
	EXTI->C1IMR1 |= (0b01 << 9);



}

//对GIC的初始化
void hal_key1_gic_init()
{
	//GICD的初始化
	//1.使能GICD层控制器
	GICD->CTRL |= 0x1;
	//2.设置GICD层的中断使能
	GICD->ISENABLER[3] |= (0x1 << 3);
	//3.设置GICD层中断优先级
	GICD->IPRIORITYR[24] &= (~(0x1F << 27));
	//4.设置GICD层中断目标分配寄存器
	GICD->ITARGETSR[24] |= (0x1 << 24);

	//GICC章节初始化
	//1.使能GICC层控制器
	GICC->CTRL |= 0x1;
	//2.设置GICC层中断优先级
	GICC->PMR |= (0x1 << 3);
}
ubuntu@vivi:06-key-c$ ^C
ubuntu@vivi:06-key-c$ cat main.c
#include "key.h"
extern void printf(const char *fmt, ...);
void delay_ms(int ms)
{
	int i,j;
	for(i = 0; i < ms;i++)
		for (j = 0; j < 1800; j++);
}
int main()
{	
	hal_key1_exit_init();
	hal_key1_gic_init();

	while(1)
	{
	}
	return 0;
}

src/do_irq.c

#include "key.h"
extern void printf(const char *fmt, ...);

void do_irq(void) 
{
	unsigned int num;
	num = GICC->IAR & 0x3ff;
	switch (num)
	{
	case 99:
		printf("key1 press#####\n");
		//1.消除EXTI层中断挂起标志位
		EXTI->FPR1 |= (0x1 << 9);
		//2.消除GICD层的中断挂起标志位
		GICD->ICPENDR[3] |= (0x1 << 3);
		break;
	case 98:
		break;
	case 97:
		break;
	}
	//3.清除获取到的中断号
	GICC->EOIR |= num;
}

result

ARM_key1按键按下，打印key1

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